feat: 新增全局布局样式并提升组件响应式表现

- 在 global-layout.scss 中引入全局布局样式，统一页面宽度与对齐方式
- 更新多个组件与页面以优化响应式，包括宽度、间距及 flex 布局等调整
- 在 API 请求中增加 loading 状态管理，改善用户体验
- 优化领券中心与商品详情页，提升功能与 UI 一致性

seller/src/api/promotion.js

@@ -145,6 +145,17 @@ export const removeSeckillGoods = (seckillId, ids) => {
 export const seckillDetail = (seckillId) => {
     return getRequest(`/promotion/seckill/${seckillId}`)
 }
+
+// 删除秒杀活动
+export const delSeckill = (id) => {
+    return deleteRequest(`/promotion/seckill/${id}`)
+}
+
+// 关闭秒杀活动
+export const updateSeckillStatus = (id, params) => {
+    return putRequest(`/promotion/seckill/status/${id}`, params)
+}
+
 // 删除秒杀商品
 export const delSeckillGoods = params => {
     return deleteRequest(`/promotion/seckill/apply/${params.seckillId}/${params.id}`);
@@ -197,3 +208,11 @@ export const getNthItemDiscountDetail = (id) => getRequest(`/promotion/nthItemDi
 export const saveNthItemDiscount = (params) => postRequest('/promotion/nthItemDiscount', params, { 'Content-type': 'application/json' })
 export const editNthItemDiscount = (params) => putRequest('/promotion/nthItemDiscount', params, { 'Content-type': 'application/json' })
 export const updateNthItemDiscountStatus = (id, params) => putRequest(`/promotion/nthItemDiscount/status/${id}`, params)
+
+// 兼容平台优惠券命名（商家端实际调用店铺优惠券接口）
+export const getPlatformCouponList = getShopCouponList
+export const savePlatformCoupon = saveShopCoupon
+export const editPlatformCoupon = editShopCoupon
+export const getPlatformCoupon = getShopCoupon
+export const deletePlatformCoupon = deleteShopCoupon
+export const updatePlatformCouponStatus = updateCouponStatus